Maximizing Output Power in a Cantilevered Piezoelectric Vibration Energy Harvester by Electrode Design
AffiliationUniversity of Cambridge; University of Chester
MetadataShow full item record
AbstractA resonant vibration energy harvester typically comprises of a clamped anchor and a vibrating shuttle with a proof mass. Piezoelectric materials are embedded in locations of high strain in order to transduce mechanical deformation into electric charge. Conventional design for piezoelectric vibration energy harvesters (PVEH) usually utilizes piezoelectric material and metal electrode layers covering the entire surface area of the cantilever with no consideration provided to examining the trade-off involved with respect to maximizing output power. This paper reports on the theory and experimental verification underpinning optimization of the active electrode area of a cantilevered PVEH in order to maximize output power. The analytical formulation utilizes Euler-Bernoulli beam theory to model the mechanical response of the cantilever. The expression for output power is reduced to a fifth order polynomial expression as a function of the electrode area. The maximum output power corresponds to the case when 44% area of the cantilever is covered by electrode metal. Experimental results are also provided to verify the theory.
CitationDu, S., Jia, Y., & Seshia, A. A. (2015). Maximizing Output Power in a Cantilevered Piezoelectric Vibration Energy Harvester by Electrode Design. Journal of Physics: Conference Series, 660(1), 012114. DOI: 10.1088/1742-6596/660/1/012114
The following license files are associated with this item:
- Creative Commons
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by/4.0/